The web structure that spans almost the entire length and breadth of the valley is a country known as Pocalo.
Each level of the web structure is a separate province, and each province has its own distinct flora and fauna, culture, dialect, food, and so forth. There are elevators connecting the provinces that allow for travel up and down.
Muru is the third tier of the lower provinces, making it the topmost province that is still in direct contact with the ground. Muru is a bit of a rough place to make a go of things, as there are a number of predators roaming about who view humans as a tasty snack. The porous nature of Muru’s borders means that people can come and go as they please, making it a desirable location for those who wish to operate outside the law.
Most settlements in Muru are built high off the ground due to the aforementioned predators and bandits. Because much of the interior is in the shadow cast by the upper provinces, almost all major settlements in Muru are found around the outer edges. The city the arrow is pointing to is Duvane, an outpost town that is not at all flashy, but a good spot to head to if you have goods to sell or trade.
Despite being rough and difficult to navigate, Muru forms a cornerstone of the Pocali economy. It is home to many rare flora and fauna which are used to make medicines. The majority of runners spend at least some of their time foraging in Muru.
There’s a decent amount of seismic activity in the Valley. Pocalo is generally highly resistant to earthquakes, as the construction-grade cloud spider silk is slightly flexible and highly shock-absorbent. But a particularly severe quake with just the right combination of vibration and shear forces got the better of Pocalo, and the next day people had to wonder, “Where did that giant rift come from?”
The Rift stretches for several miles across the Muru interior, and plunges several hundred feet down into Eradu, the province immediately below Muru.
This major geographic change also altered the course of the Red Silt River, forming a lake known as The Flood, which drains into Eradu in the form of a huge waterfall. During dry times this can cause the river to stop flowing further south from The Flood, causing water management problems for folks downstream.
Both The Rift and The Flood have made any form of travel across Muru a bit of a challenge. Boats can no longer ply the course of the Red Silt River. And the one crossing point, the Cashel Bridge, is in the process of sloughing off into the Rift.
Because The Rift appeared overnight, the Cashel Bridge was put up in extreme haste, with the idea that a better, more permanent solution would be implemented later. After only a few years it has begun to fall apart, but there’s little incentive to build a more permanent crossing. Most people have opted for more reliable alternatives, and have abandoned the pre-Rift routes that took them past this region.
The eponymous Silk Sky in the Valley is a multi-leveled, mostly-opaque structure made of the silk of domesticated cloud spiders (“Pocalo” literally means “spider web”). So how does light get down to the interior of the lower levels? The answer: LIGHT HOLES.
Throughout each province you’ll find numerous holes in the floor and in the ceiling, which allow sunlight and rainwater to filter through. Not too surprisingly, the further down you go, the less light and rainwater you get.
In general, for the lower provinces, populations cluster at the edges where the light is present throughout the day. An interior area that gets particularly good daylight coverage is called an oasis, and may have sufficient resources to support a small settlement or a waystation. Even if they aren’t suitable for permanent habitation, they’re usually an excellent source of rare plants, or can make for decent temporary campgrounds.